Eamieo de pal agios



c E AIAIAAlMAX sa.

PISTON VALVE.

RAMIRO DE PALACIOS.

(No Model.)

^ lUNTTnn dTaTns nAuino DE PALACIOS,

FaTnrvT Trice,

OF BERLIN GERMANY.

PISTON=VALVE.

EPECFECATION forming part of Letters Patent No. 307,750. dated November ll, 1884. Application filed July 21, 1884. (No model.) Patented in EnglundJune18, 1884, No. 9,161.

T0 all whom it may concern.-

Be it known that I, RAMIRO' DE Patricios, of Berlin, in the Empire of Germany, have invented a new and useful Improvement in Valve-Gear for Steam and other Engines and Pumps, of which the following is a full, clear, and exactdescription. (I made application for Letters Patent in England, No. 9,161, dated J une 18, 1884, for fourteen years.)

This invention relates to an improved piston-valve for steam and other engines; and it consists in a distribution-valve constructed and actuated directly by tappets on the pistoured, as hereinafter specied.

I will describe the invention as applied to a steam-engine, and in order that it may be more readily understood I have illustrated it in the accompanying drawings, iirwhicli- Figure 1 is a longitudinal section ofthe cyl inder with a single valve. Fig. 2 is a similar View represcnti ng a cylinder with two valves arranged symmetrically, one at either side; and Fig. 3 is a top plan of Fig. 2, with the upper tappct removed. Figs. 4, 5, and Gare enlarged sectional views ofthe valves.

The valve E in Fig. 1 is of circular section, and works like a pist-on within a cylindrical valve-chest, B, of the same or other length as the cylinder A, the length of the valve E being less than that of the valve-chest by the amount of its travel. rlhe valve-chest B has a circular inlet steam-port, a, at exactly the middle of its length, and the valve E has two corresponding circular ports, d d', separated by a central divisionspiece, e, and which ports, on the valve reaching one or other end of its stroke, respectively coincide with or come opposite to the steam-port a of the valve-chest. Both the ports d d lead into the same longitudinal passage, b, in the valve, which terminates near each end of the valve in circular ports c c on the side next the cylinderA, and which, on the valve reaching one or other end of its stroke, respectively coincide with corresponding ports, g g', leading` into the cylinder A. Opposite to or on the same level with these ports g g are exhaust-ports h 7i in the valve-chest, at one or other of which the eX- haast-steam escapes past the end of the valve l5o .E4 when the latter is at the opposite end of its l stroke. All these ports and the faces eff of those portions of the valve which work over and close the ports a g g and the faces q q of the valyechest may be of equal diameter or width, as in Figs. 1, 2, and 1--that is to Say, the diameters of ports a gg 7L h and of the ports d d b c c', the width of the working-faces q q and of those cff, are all equal to one an other 5 or, as in Fig. 5, the diameters of all the ports are equal to one another, but less than the width of the working-faces q q and eff, which are also equal to one another; or, as in Fig. 6, the diameters of ports d d b c c are equal to one another, but less than the ports a g g h It', which are also equal to one another, but are less than the width of the faces q q e f j, which are also equal to one another.

In Fig. 4 the induction and eduction ports are equal and the closure is instantaneous. In Fig. 5 the induction and eductionports are also equal, but the closure is longer and surer, and in Fig. (3 the eduction-ports are larger' than the induction, the closure being nearly the same as in Fig. 5. In all cases, whatever may be the proportions, the port c must be exactly at the middle of the valve-chest B and the division-piece e at the middle ofthe valve E. To reduce the frict-ional surface of the valve in its chest, the portions intermediate of its working-faces would be channeled or made of reduced diameter and supplied with oil by suitable lubricators connected with orifices 'a' i. The valve is attached at the ends to valverods m m', passing through the adjacent ends of the valve-chest, and attached, respectively, to cross-heads H H', whose other ends are either connected by a rod, G, passing through holes in the cylinder-covers and alongside the cylinder at the opposite side thereof, as in Fig. 1, or by another valve similar to the first and symmetrical therewith, as in Figs. 2 and 3, the whole in either case forming a rigid frame capable of receiving reciprocating motion in the direction of the length of the cylinder to the extent of the travel of the valve, which, as before mentioned, is equal to the dierence in length between the valve and its chest. This motion is imparted to it by the piston C, having adjacent bosses F F', and a rod, D,

carried through both covers of the cylinder roo e som-iso vary the point in the piston-stroke at which they act on the valve, and consequently to vary the length of the piston-stroke itself, if required.

The'operation is as follows: rIhe piston C having arrived at the bottom of the cylinder A, and just previous thereto having, by means of tappet N', moved the valve E to the bottom of the valvechestB, steam is admitted through ce cl b c and g to the under side of the piston C and raises it, the valve meanwhile re-- maining stationary, while the exhaust-steam escapes at g h across the valve-chest B and past the top end of the Valve. Shortly before the piston C reaches the top of its stroke the tappetN on the lower end of the piston-rod D strikes the adjacent cross-head H and moves the valve E toward the upper end of the valve-chest B. In this motion oi' the valve its faces ff and e rst pass over and close simultaneously all the ports g g a and h h', which is a very important feature of the invention, after which it passes on until it reaches the upper end of the valve-chest, thusl reversing the -direction of the induction and eduction of steam, whereupon steam is admitted through a d b c and g to the upper side of the piston, the exhaust-steam then escaping at g and h across the valve-chest and past the lower end of the valve, and the same operation is repeated for the neXt stroke in the opposite direction. The

,valve E is cushioned at the end of its stroke by the exhauststeam imprisoned between the end of the valve and the cover of the valvechest, and which escapes with some resistance alongside the valve-rods m or m', which pass through holes in the valve-chest covers, which are unprovided with stuffing-boxes to permit of such escape. In the case of a vertical cylinder of large size the valve-gear frame would be suitably counterbalanced, and the lower cover of the valvechest would have small holes for the escape of condensed water. The valve-rods m m', if of round section, would be screwed into the ends of the valve E and secured by cotters s, and would be secured to the cross-heads H H by lock-nuts a o n o', and by square collars k k', cottered to the rods m m, and countersunk in corresponding recesses in the cross-heads to prevent them from turning, the rod G being secured to the opposite ends of the cross-heads by similar collars, Z Z', and lock-nuts n2 o2 n3 o3,- or the valve-rod may be of square section, in which case the collars are not required. t

This improved valve-gear, which is strong, durable, and easily and cheaply constructed, can be employed, with suitable modifications in its proportions, in all situations, such as in ships, mines, vehicles, and engines generally, whether actuated by steam, compressed-air, gas, or water power.

I-Iaving now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is- 1. The cylindrical valve E, constructed with central longitudinal passage, b, inner ports, c c, outer ports, d d', and divisionpiece e, in combination with the valve-chest B', having aligned openings g h and aligned openings g h, the said'valve fitting said valve-chestlike a piston, substantially as herein shown and described.

2. rIhe cylindrical valve E, constructed with central longitudinal passage, b, inner ports, c

c, outer ports, d d', and division-piece e, in'

RAMIRO DE PALACIOS.

XVitnesses: 1

J oHANNns KAHLBAUM, B. Roi. 

